?Thin Speakers and Superior Sound Quality?thickness is only one-third of the average speaker, which is very comfortable for side sleepers. True HD high fidelity sound featuring latest Bluetooth 4.1 technology that produce great sound quality, bluetooth can pair device easily. It is the best gift for family or friends with a exquisite packaging. It connect cellphone or tablet via bluetooth in your device setting, not app. please see "how to connect bluetooth" in the description | ?Size and Speakers Adjustable?Size is 20.3-26.5inch, Velcro is adjustable, also fit big heads, the delicate wiring connected to the speakers that go from ear to ear is very sturdy, you can adjust adjust the position of the speakers for your ears to hear more clearly | ?Bluetooth Sleeping Eye Cover?Block light to make your sleep better, allows you to listen to music without wearing additional headphones, which make you fall asleep faster. Extra cushion makes eyemask and nose touch better, which can be completely shaded. Best for frequent flyers to sleep on long flights or sensitive sleepers (insomnia) who dislike glaring lights in any occasions. Sleep in a light blocked world whenever and wherever. Perfect for air travel, relaxation, meditation, insomnia. | ?Comfortable Material and Washable?Music bluetooth eye shade is made from elvet and elastic cotton, and provide a soft and comfortable feeling. Fabric liner separated from stitching is not defective,it is the place to take out the bluetooth module, so you can full wash the eye mask. | ?Set-in Lithium Chargeable Battery And Easy to Pair?Built-in 200mAh high-performance battery, Charge via USB Cable. Charge about 2 hours provide 6-8 hours playing time. How to connect Bluetooth: 1. close all your bluetooth in the phone. 2. long press the "on/off" button in the eyemask to red/blue light flash. 3. open you bluetooth in the phone, find the Bluetooth name BT-FAAH, then connect. 4, after connect the bluetooth, you can listening the music directly!